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发明名称
Testing apparatus for telephone systems
摘要
申请公布号
US2632817(A)
申请公布日期
1953.03.24
申请号
US19510210040
申请日期
1951.02.08
申请人
AUTOMATIC ELECTRIC LABORATORIES, INC.
发明人
KESSLER ERANK
分类号
H04M3/30
主分类号
H04M3/30
代理机构
代理人
主权项
地址
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